Dry battery.



PATEN TED APR S. GOCHRANE.

' DRY BATTERY.

APPLIOATIOH FILED JAN. 10, 1906.

W W n SAMUEL COCHRANE, ()F JERSEY ClTY,

NEW JERSEY, ASSIGXOR TO lil-NCOLN ELECTRIC COMPANY, OF JERSEY (.lTY. NEW JERSEY, A COItPOIL VPIOX OF NEl/V JERSEY.

DRY BATTERY.

Specification of Letters Patent.

Patented April 23, 1907.

Application filcrl Jan ary 19, 1906. Serial No. 295.753.

To all whom it may concern:

Be it known that I, SAMUEL COCIIRANE, a

' citizen of the United States, residing at Jcr- I teries or cells are in contact, and the cells understanding thereof reference is to be had material, placed either above, below, or on soy City, in the county of Hudson and State i of New Jersey, have invented a new and usei ful Electrical Battery, of which the following I My invention relates to improvements in that type of electrical batteries known as dry batteries, or cells in .1'hich the excitant or electrolyte is held by an absorbent mal terial within the cell.

In the form of cell commonly used, the cell 5 or cup is made of zinc and covered on the outside with paper; this paper being absorbent, a current of electricity is set up when the batis a specification.

thereby run down.

The object of my invention is to provide cells that are absolutely insulated, and which may, therefore, beplaced in contact with each otherthat is, packed in contact, without danger of deterioration; and for a full to the accompanying drawing forming a part of this specification, and in which Figures 1 and 2 represent vertical sections through the center of the cell.

A represents the cup or cell, and it is in the-nature of the material constituting this cup that my invention primarily resides. The cup A I make of an absorbent, fibrous material and I impregnate the outer side of the fibre with a Water and acid proof insulating compound, such as an asphaltu' n compound, or a petroleum compound, leaving the inner side absorbent.

B is the bottom of the cell, and may be made of fibre integral with the cup, or of fibre or metal and sprung into place so as to be watertight or sealed and protected with an insulating compound which insulating compound ma be of wax, coal tar, petroleum compoun or any other well-known both sides of the bottom B.

D is the active element or electrolyte, which formerly consisted of a paste, of sal ammoniao, chloride of zinc; plaster, flour and water, but now usually consists of an absorbent material such as blotting paper, saturatcd-with a solution of the electrolyte, such as sal ammoniac and chloride of zinc. The

l inner side D, Fig. 2, may constitute this absorbent material.

E is the depolarizing agent, usually peroxide of manganese.

F is the carbon or any other electroncgative substance, and G is the zinc, or any other electro-positive substance.

H and 11' are the binding posts connected to F and G and I is the insulated top or cover of the cell.

As both sidcsof the zinc G are exposed. to the action of the electrolyte D, a cell of my invention will have a much greater strength and life than an ordinary cell of the same size; or my cell will require only about one-half the weight of zinc of an ordinary cell of the same electrical capacity.

The fibre cup, being a poor conductor of heat, protects the cell as a whole from atmospheric changes, and insures its having a practically constant electrical value under all conditions of temperature.

.I laving now fully described my invention, what claim as new and desire to secure by Letters Patent, is

1. A liquid tight battery cell or cup made of a fibrous material, saturated on its outer side only and to an appreciable depth with a non-absorbent insulating compound, the inner side being left absorbent.

2. A liquid tight battery cell or cup made of a fibrous material, saturated on its outer side and to an appreciable depth with a nonabsorbent insulating compound and on its mner side with an electrolyte.

3. A dry battery consisting of an outer cell of a fibrous material saturated on its outer side with an insulating compound, the inner side being left absorbent an electro-positive element within the cell and surrounded with an electrolyte, an eleetro-negative element enclosed by the elcctro-positive element and covered by a depolarizing agent which is surrounded by the electrolyte.

4. A dry battery composed of an outer cell of a fibrous material, saturated on its outer side with an insulating com ound and on its inner side with an electro yte; an electropositive clement enclosed by the cell and in contact with the electrolyte saturated inner side of the cell: an cle'ctro-negative element enclosed by the positive element and separated therefrom by a depolarizing agent. l

A (31 battery composed of an outer cell polarizing agent Within said electrolyte and ol :1 filrous mntenal, saturated on the outer an electro-negatwe element wltlnn and covlo sule Wull an insulating compound and on the I ered bysmd depolmlzlng agent. i1 nor side w' vl1 n elec'rol be: av elwctror v 1- It 1 3 I l SAN DEL cooumm.

positive element within the cell and in 0011- tzmcb with electrolyte saturated inner side thereof; an electrolyte within and in contact with said eleeLro-positive element; a de- Vvltnesses 11. E. CUNNINGHAM, G120. R. FERGUSON. 

